Cells Alive!

Cells Alive! The majority of the site is free of cost and it has great ideas, interactive activities with film and computer-enhanced images.

Teachers Domain

Free, great science and math lessons, videos, activities.

U.S. Geological Survey: Science for the Changing World

According to the USGS, they are "an unbiased, multi-disciplinary science organization that focuses on biology, geography, geology, geospatial information, and water, we are dedicated to the timely, relevant, and impartial study of the landscape, our natural resources, and the natural hazards that threaten us." Click on Michigan for science in our backyard.